3. Click the phone icon in the lower left corner of the Jabber window (circled in red in the image below) to open the Phone Controls menu and select "Use my computer for calls." (If this setting is not changed, Jabber will initiate calls from your desk phone and not the PC).

4. If you have multiple microphones or speakers plugged into your computer, you can select "Audio Options..." in this Phone Controls menu to select which speakers and microphone to use in your calls.

5. Type the phone number you wish to call in the "Search or Call Bar" (highlighted with a blue box in the image below). Type out the number as you would dial it from your office desk phone. For example, you must type an "8" in front of the phone number to reach an outside line just like you have to dial "8" from your office phone.

6. Click the green Call button to the right of the Search or Call Bar to start your call. (Note: the button is grayed out until a number is typed in the Search or Call Bar).

7. Once in a call, you can use the buttons in the black call controls bar to open an on-screen keypad for number entry, mute your microphone, and adjust the volume of your speakers. Clicking the "More" button reveals options for placing the call on hold, transferring the call, or adding more lines to the call ("Conference").